
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Chang, Endocrinologist in Lake Grove, NY?
Dr. Alan Chang, MD is an Endocrinologist, who primarily practices in Lake Grove, NY. Dr. Chang is fluent in English and Mandarin, and is currently seeing new patients. Dr. Chang’s practice accepts Medicare, Aetna, Cigna, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Chang’s office.
What are Areas of Expertise for Dr. Chang?
Dr. Alan Chang, MD is a highly-rated, board-certified Endocrinologist known for expertly diagnosing, treating, and managing a wide array of related conditions and procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Chang empowers patients to confidently navigate their health journey, specializing in Adrenal Disorders, Diabetes, Lipid Disorders, and comprehensive wellness support. Serving the Lake Grove, NY community, Dr. Chang is dedicated to enhancing lives through expert, patient-centered care.
What languages does Dr. Chang speak?
Dr. Chang and their clinical team can communicate with patients in the following languages:
English
Mandarin
What conditions does an Endocrinologist like Dr. Chang typically treat?
As an Endocrinologist, Dr. Chang diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Chang. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Type 2 Diabetes with High Blood Sugar
- Type 2 Diabetes
- Diabetes Type 2
- Hyperglycemia
- Type 2 diabetes
- Diabetic Hyperglycemia
- High Blood Glucose
- High Sugar Levels
- Diabetes Mellitus Type 2
- Adult-Onset Diabetes
- Non-Insulin Dependent Diabetes
ICD-10 Codes:
- E1165: Type 2 diabetes mellitus with hyperglycemia
- E119: Type 2 diabetes mellitus without complications
Also known as:
- Other Hypothyroidism
- Hypothyroidism
- Congenital hypothyroidism
- Hypothyroidism (Underactive Thyroid)
- Underactive Thyroid
- Low Thyroid Function
- Thyroid Gland Underactivity
ICD-10 Codes:
- E038: Other specified hypothyroidism
- E039: Hypothyroidism, unspecified
Also known as:
- Type 1 Diabetes with High Blood Sugar
- Diabetes Type 1
- Hyperglycemia
- Type 1 diabetes
- Diabetic Hyperglycemia
- High Glucose in Type 1 Diabetes
- High Blood Sugar Episode
ICD-10 Codes:
- E1065: Type 1 diabetes mellitus with hyperglycemia
Also known as:
- Thyroid Cancer
- Thyroid Carcinoma
- Malignant Thyroid Nodule
- Thyroid Gland Cancer
ICD-10 Codes:
- C73: Malignant neoplasm of thyroid gland
Also known as:
- Obesity
- Take Charge of Your Health: A Guide for Teenagers
- Excess Weight
- Being Overweight
- High BMI
ICD-10 Codes:
- E669: Obesity, unspecified
Also known as:
- Nontoxic Multinodular Goiter
- Thyroid Disease
- Multinodular Goiter
- Lumpy Enlarged Thyroid
ICD-10 Codes:
- E042: Nontoxic multinodular goiter
Does Dr. Chang accept my insurance?
Dr. Chang accepts most major insurance plans. Important: Please call our office at before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Chang accept in Lake Grove, NY?
Dr. Chang in Lake Grove, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
Centene Corporation
Cigna Group
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
EmblemHealth
Healthfirst New York
National Benefit Fund
Service Employees International Union (SEIU)
UnitedHealth Group
View All Insurances
Where is Dr. Chang's office located?

Stony Brook Internists
4 Smith Haven Mall, Suite 203
Lake Grove, NY 11755
What is Dr. Chang's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Chang's National Provider Identifier (NPI) number is 1649408675.
What common questions do patients ask about Dr. Chang?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Chang
What is Dr. Alan Chang's specialty?
Dr. Chang is a Endocrinologist near Lake Grove, NY.
What does an Endocrinologist do?
An internist specializing in disorders of the endocrine glands, including the thyroid and adrenal glands. This specialist also manages a range of conditions such as diabetes, metabolic and nutritional disorders, obesity, pituitary disorders, and menstrual and sexual health issues.
Is this Dr. Alan Chang affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Chang is affiliated with Stony Brook University Hospital which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see an Endocrinologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see an Endocrinologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Alan Chang accepting new patients in Lake Grove, NY?
Yes, Dr. Alan Chang is accepting new patients at this time.
Does Dr. Alan Chang offer online booking?
Please contact Dr. Chang's office for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Alan Chang?
Please contact Dr. Chang's office for information regarding telehealth appointment availability or for scheduling assistance.
Other Endocrinologist Near Lake Grove, NY

Dr. Igor Kravets, MD is an Endocrinologist, who primarily practices in Lake Grove, NY. He has been practicing for over 18 years and is board certified.

Stony Brook Medicine Advanced Specialty Care
4 Smith Haven Mall, Suite 203
Lake Grove, NY 11755

Dr. Marie Gelato, MD is an Endocrinologist, who primarily practices in Lake Grove, NY. She is board certified.

Stony Brook Medicine
4 Smith Haven Mall, Suite 203
Lake Grove, NY 11755

Dr. Carolyn Maxwell, MD is an Endocrinologist, who primarily practices in Commack, NY with 1 additional practice location. She is board certified.

Stony Brook Internists - Endocrinology
500 Commack Road, Suite 103
Commack, NY 11725
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